package com.example.helloworld;

public class HelloWorld {
    public static void main(String[] args) {
        System.out.println("hello world !");
        int a = 10;
        int b = 20;
        swapping(a, b);
        System.out.println("a = " + a + " and b = " + b);
    }

    public static  void swapping(int a, int b) {
        int temp = a;
        a = b;
        b = temp;
    }
}


